According to Boston Globe , Boston police have confirmed that the first blast occured around 3 p.m. along the marathon route in the area of Boylston Street. A second explosion went off about 10 seconds later, the New York Times reported. The two explosions were about 550 feet apart. The first clear footage of the Boston Marathon Bombings has been released. The bomb you see here is the first explosion, which was immediately followed by a second explosion. US president Barack Obama has delivered his official statement on the Boston bombing, the deadly terror attack causing twin explosions during the Boston Marathon on Monday, April 15, 2013. Statement by the President James S. Brady Press Briefing Room Good afternoon, everybody. Earlier today, I was briefed by my homeland security team on the events in Boston. We’re continuing to monitor and respond to the situation as it unfolds. And I’ve directed the full resources of the federal government to help state and local authorities protect o...